CN103945436B - It is a kind of to adjust the method and apparatus that enhanced distributed channel accesses parameter value - Google Patents

Abstract

The present invention relates to communication technical field, more particularly to a kind of method and apparatus for adjusting enhanced distributed channel access parameter value.The method of the embodiment of the present invention includes：AP judges whether to need to adjust up EDCA parameter value or descending EDCA parameter value according to the uplink throughput value and downlink throughput capacity value of current period；When it is determined that needing to adjust up EDCA parameter value, up EDCA parameter value is adjusted according to the quantity of the terminal in active state in current period；And when it is determined that needing to adjust descending EDCA parameter value, descending EDCA parameter value is adjusted according to the quantity of the terminal in active state in current period.Whether due to can be to needing adjustment up-downgoing EDCA parameter value to judge, and up-downgoing EDCA parameter value after adjusting be adapted with current network environment, so that avoid causes the problem of network performance is deteriorated using the default EDCA Parameters value of fixation.

Description

It is a kind of to adjust the method and apparatus that enhanced distributed channel accesses parameter value

Technical field

The present invention relates to communication technical field, more particularly to a kind of side for adjusting enhanced distributed channel access parameter value Method and equipment.

Background technology

With continuing to develop for wireless communication technology, enjoy in a variety of ways whenever and wherever possible wireless network resource turn into can Energy.However, multimedia service is in WLAN（Wireless Location Area Network, WLAN）In application, So that nervous radio open resource is more had too many difficulties to cope with originally.

To solve WLAN service quality（Quality of Service, QoS）Problem, Electrical and Electronic engineered tissue （Institute of Electrical and Electronics Engineers, IEEE）Introduce IEEE802.11e marks It is accurate.

IEEE802.11e extends former IEEE802.11 Media access contorl（Medium Access Control, MAC）Layer distributed coordination function（Distributed Coordination Function, DCF）And point coordination function（Point Coordination Function, PCF）Channel Access Mechanism, forms enhanced distributed channel and accesses EDCA （Enhanced Distributed Channel Access) and the access of Hybrid Coordination Function control channel（Hybrid Controlled Channel Access, HCCA).EDCA enhances DCF mechanism, distinguishes the priority of different business application, protects Hinder the channel access ability of high-priority service, and ensure the bandwidth of high-priority service to a certain extent；HCCA strengthens PCF mechanism, passes through the access point to supporting QoS（Access Point, AP）Centralized Control, using polling mode as support QoS Website（Station, STA）Interface-free resources are there is provided improved access bandwidth and reduce prolonging for high-priority service for distribution Late.But because HCCA mechanism is complicated compared to EDCA mechanism, PCF mechanism, currently without being promoted.

For EDCA parameters, IEEE802.11e has given one group of default parameter value, and the default parameter value is applied to WLAN net The more stable situation of network environment.But actual WLAN network environment is extremely complex, the competition and conflict of such as channel, speed Difference and fairness, the asymmetry of transmission（Up-downgoing）, etc..Default parameter value can only ensure WLAN in stable network Performance under environment, once network environment changes, default parameter value may suppress WLAN overall performance.

Therefore, EDCA parameter value is set using default parameter value, it is impossible to meet the network environment of change.

The content of the invention

The method and apparatus that enhanced distributed channel accesses parameter value is adjusted the embodiments of the invention provide a kind of, is used to Solve present in prior art to set EDCA parameter value using default parameter value, it is impossible to which the network environment for meeting change is asked Topic.

The embodiment of the present invention provides a kind of method for adjusting EDCA parameter value, and methods described includes：

AP judges whether to need to adjust up EDCA ginsengs according to the uplink throughput value and downlink throughput capacity value of current period Numerical value or descending EDCA parameter value；

The AP is when it is determined that need to adjust up EDCA parameter value, according to the terminal that active state is in current period Quantity adjust up EDCA parameter value；And

The AP is when it is determined that need to adjust descending EDCA parameter value, according to the terminal that active state is in current period Quantity adjust descending EDCA parameter value.

, can be it is determined that needing to adjust up EDCA parameter value or descending EDCA parameter value using the scheme of the embodiment of the present invention When up EDCA parameter value or descending EDCA parameter value are adjusted according to the quantity of the terminal in active state in current period, make Up EDCA parameter value or descending EDCA parameter value after must adjusting are adapted with current network environment, so as to avoid use Fixed default EDCA Parameters value causes the problem of network performance is deteriorated.

Alternatively, the AP judges whether to need to adjust up EDCA parameter value, specifically includes：

The AP judges whether the ratio of the uplink throughput value and total throughput value is more than default first threshold； If being more than, it is determined that need to adjust up EDCA parameter value；If being not more than, it is determined that up EDCA parameter value need not be adjusted； Wherein, total throughput value is the uplink throughput value and the downlink throughput capacity value sum；

The AP judges whether to need to adjust descending EDCA parameter value, specifically includes：

The AP judges whether the ratio of the downlink throughput capacity value and total throughput value is more than default Second Threshold； If being more than, it is determined that need to adjust descending EDCA parameter value；If being not more than, it is determined that descending EDCA parameter value need not be adjusted；

Wherein, total throughput value is the uplink throughput value and the downlink throughput capacity value sum.

In this way, whether adjustment can be needed according to the ratio in judgement of uplink throughput value current AP and total throughput value Up EDCA parameter value so that when the uplink throughput for judging AP is larger, up EDCA parameter value can be adjusted；With And whether need to adjust descending EDCA parameter value according to the ratio in judgement of downlink throughput capacity value current AP and total throughput value, So that when the downlink throughput capacity for judging AP is larger, can be adjusted to descending EDCA parameter value.

Alternatively, the AP determines the terminal in active state in the following manner：

The AP determines estimating for current period according to the message number of each subcycle in the terminal last cycle of association Message number；

The AP determines institute when it is determined that the message total number of the terminal current period estimates message number more than described in Terminal is stated for the terminal in active state；Or, the AP is it is determined that the uplink message total number of the terminal current period During more than default three threshold value, it is the terminal in active state to determine the terminal；Or, the AP is it is determined that the end When holding the downlink message total number of current period more than default four threshold value, it is the end in active state to determine the terminal End.

In this way, can be judged according to the up-downgoing message number of the terminal current period associated with AP the terminal it is current whether Data are transmitted between AP, so as to judge whether the terminal is in active state.By to each terminal associated with AP Judge whether the terminal is in active state, you can determine the quantity of the terminal in active state in current period.

Alternatively, the AP estimates message number according to being determined below equation：

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor institute The message number of i-th of subcycle in terminal last cycle is stated, N is the number for the subcycle that a cycle is included.

In this way, the terminal can be determined when it is determined that the message total number of terminal current period is more than message number is estimated For the terminal in active state.

Specifically, the AP adjusts up EDCA parameters according to the quantity of the terminal in active state in current period Value, is specifically included：

Arbitration Inter Frame Space AIFS in the up EDCA parameter value is set to by the APWill Minimum competition window CWmin in the up EDCA parameter value is set toAnd by the up EDCA parameters Maximum contention window CWmax in value is set toWithBetween random number；Its In, n is the quantity of the terminal in active state in the current period, and a, b and e are the positive integer more than 1, and c and d are just whole Number；

The AP adjusts descending EDCA parameter value, specific bag according to the quantity of the terminal in active state in current period Include：

AIFS in the descending EDCA parameter value is set to by the APBy the descending EDCA CWmin in parameter value is set toAnd be set to the CWmax in the descending EDCA parameter valueWithBetween random number.

In this way, can when it is determined that needing to adjust up EDCA parameter value, according in current period in active state The quantity of terminal adjusts up EDCA parameter value, and when it is determined that needing to adjust descending EDCA parameter value, according to current period The quantity of the interior terminal in active state adjusts descending EDCA parameter value.Also, due to the maximum in up EDCA parameter value Competition window is random number, and collision is competed caused by preempting resources to send upstream data so as to reduce terminal.

Alternatively, the AP is after up EDCA parameter value is adjusted, in addition to：

The AP is by the up EDCA parameter value after adjustment is by beacon beacon frames or detects request probe request Frame is notified to terminal.

In this way, the up EDCA parameter value after adjustment being notified to, to terminal, terminal can be according to AP notice to up EDCA parameter value is adjusted.

The embodiment of the present invention provides a kind of equipment for adjusting enhanced distributed channel access EDCA parameter value, the equipment Including：

Judge module, judges whether to need adjustment for the uplink throughput value and downlink throughput capacity value according to current period Up EDCA parameter value or descending EDCA parameter value；

Processing module, for when the judge module determines to need to adjust up EDCA parameter value, according to current period The quantity of the interior terminal in active state adjusts up EDCA parameter value；And in the case where the judge module determines to need to adjust During row EDCA parameter value, descending EDCA parameter value is adjusted according to the quantity of the terminal in active state in current period.

, can be when it is determined that needing to adjust up EDCA parameter value or descending EDCA parameter value according to current week using the equipment The quantity of the terminal in active state adjusts up EDCA parameter value or descending EDCA parameter value in phase so that upper after adjustment Row EDCA parameter value or descending EDCA parameter value are adapted with current network environment, so as to avoid using fixed acquiescence EDCA parameter value causes the problem of network performance is deteriorated.

Alternatively, the judge module specifically for：

Judge whether the ratio of the uplink throughput value and total throughput value is more than default first threshold；If big In, it is determined that need to adjust up EDCA parameter value；If being not more than, it is determined that up EDCA parameter value need not be adjusted；And

Judge whether the ratio of the downlink throughput capacity value and total throughput value is more than default Second Threshold；If big In, it is determined that need to adjust descending EDCA parameter value；If being not more than, it is determined that descending EDCA parameter value need not be adjusted；Wherein, Total throughput value is the uplink throughput value and the downlink throughput capacity value sum.

In this way, can according to the ratio in judgement of the current uplink throughput value of the equipment and total throughput value whether needs Adjust up EDCA parameter value so that when the uplink throughput for judging the equipment is larger, up EDCA parameter value can be entered Row adjustment；And whether needed according to the ratio in judgement of the current downlink throughput capacity value of the equipment and total throughput value under adjustment Row EDCA parameter value so that when the downlink throughput capacity for judging the equipment is larger, descending EDCA parameter value can be adjusted.

Alternatively, the processing module is additionally operable to：

Message is estimated according to what the message number of each subcycle in the terminal of association last cycle determined current period Number；When it is determined that the message total number of the terminal current period estimates message number more than described in, it is place to determine the terminal In the terminal of active state；Or, it is determined that the uplink message total number of the terminal current period is more than default 3rd threshold During value, it is the terminal in active state to determine the terminal；Or, it is determined that the downlink message of the terminal current period is total When number is more than default four threshold value, it is the terminal in active state to determine the terminal.

In this way, can judge that the terminal is current according to the up-downgoing message number of the terminal current period associated with the equipment Whether data are transmitted between the equipment, so as to judge whether the terminal is in active state.By being set to each with this The terminal of standby association judges whether the terminal is in active state, you can determine the terminal in active state in current period Quantity.

Alternatively, the processing module according to below equation determination specifically for estimating message number：

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor institute The message number of i-th of subcycle in terminal last cycle is stated, N is the number for the subcycle that a cycle is included.

In this way, the terminal can be determined when it is determined that the message total number of terminal current period is more than message number is estimated For the terminal in active state.

Alternatively, the processing module specifically for：

, will be secondary in the up EDCA parameter value when the judge module determines to need to adjust up EDCA parameter value Interframe space AIFS is cut out to be set toMinimum competition window CWmin in the up EDCA parameter value is set It is set toAnd be set to the maximum contention window CWmax in the up EDCA parameter value WithBetween random number；Wherein, n is the number of the terminal in active state in the current period Amount, a, b and e are the positive integer more than 1, and c and d are positive integer；And

When the judge module determines to need to adjust descending EDCA parameter value, by the descending EDCA parameter value AIFS is set toCWmin in the descending EDCA parameter value is set toAnd by institute The CWmax stated in descending EDCA parameter value is set toWithBetween random number.

In this way, can when it is determined that needing to adjust up EDCA parameter value, according in current period in active state The quantity of terminal adjusts up EDCA parameter value, and when it is determined that needing to adjust descending EDCA parameter value, according to current period The quantity of the interior terminal in active state adjusts descending EDCA parameter value.Also, due to the maximum in up EDCA parameter value Competition window is random number, and collision is competed caused by preempting resources to send upstream data so as to reduce terminal.

Alternatively, the processing module is additionally operable to：

After up EDCA parameter value is adjusted, the up EDCA parameter value after adjustment is passed through into beacon beacon frames or spy Make a thorough investigation of and ask probe request frames to notify to terminal.

In this way, can notify the up EDCA parameter value after adjustment to terminal, terminal can be according to the notice pair of the equipment Up EDCA parameter value is adjusted.

Brief description of the drawings

Fig. 1 is the network topological diagram in the embodiment of the present invention one；

Fig. 2 is the step schematic diagram of the method for adjustment EDCA parameter value in the embodiment of the present invention one；

Fig. 3 is the structural representation of the equipment of adjustment EDCA parameter value in the embodiment of the present invention two.

Embodiment

The AP of scheme of the embodiment of the present invention can judge whether to need in each cycle to adjust up EDCA parameter value or under Row EDCA parameter value, and when it is determined that needing to adjust up EDCA parameter value, according to the end that active state is in current period The quantity at end adjusts up EDCA parameter value；And when it is determined that needing to adjust descending EDCA parameter value, according in current period The quantity of terminal in active state adjusts descending EDCA parameter value, can according to network environment to up EDCA parameter value or under Row EDCA parameter value is adjusted in real time.

It should be noted that the scheme of the embodiment of the present invention can be applicable in the AP of network topological diagram as shown in Figure 1, figure The access controller shown in 1（Access Controller, AC）Two AP of lower association（For example, AP1 and AP2）, under each AP Multiple terminals can be associated（For example, 1~terminal of associated terminal 4 under AP1）, the AP associated under AC quantity and the STA associated under AP Quantity can be set according to actual needs.

With reference to Figure of description, embodiments of the present invention is further illustrated, but the present invention is not limited to following reality Apply example.

Embodiment one：

As shown in Fig. 2 the method that EDCA parameter value is adjusted in the embodiment of the present invention one comprises the following steps：

Step 201：AP judges whether to need to adjust according to the uplink throughput value and downlink throughput capacity value of current period Row EDCA parameter value or descending EDCA parameter value；

Step 202：AP when it is determined that needing to adjust up EDCA parameter value, according in current period in active state The quantity of terminal adjusts up EDCA parameter value, and when it is determined that needing to adjust descending EDCA parameter value, according to current period The quantity of the interior terminal in active state adjusts descending EDCA parameter value.

In step 201, the up report that the uplink throughput value of current period can be received according to AP current periods from terminal The total quantity of text determines that similarly, the downlink throughput capacity value of current period can be sent to the descending of terminal according to AP current periods The total quantity of message is determined.

Specifically, AP judges whether to need the specific implementation for adjusting up EDCA parameter value can be in step 201： AP judges whether the ratio of above-mentioned uplink throughput value and total throughput value is more than default first threshold U_R_ Threshold, if being more than, it is determined that need to adjust up EDCA parameter value；If being not more than, it is determined that need not adjust up EDCA parameter value.Wherein, total throughput value is uplink throughput value and downlink throughput capacity value sum, and first threshold is more than 0.5. During implementing, first threshold can be configured according to actual conditions, for example, settable first threshold is 0.6.

Alternatively, the specific implementation that AP judges whether to need to adjust up EDCA parameter value in step 201 can be with For：AP judges whether the ratio of above-mentioned uplink throughput value and downlink throughput capacity value is more than the first threshold value, if, it is determined that need Adjust up EDCA parameter value；If not, it is determined that up EDCA parameter value need not be adjusted.Wherein, the first threshold value is more than 1, during implementing, the first threshold value can be configured according to actual conditions, for example, settable first threshold value is 1.5。

Specifically, AP judges whether to need the specific implementation for adjusting descending EDCA parameter value can be in step 201： AP judges whether the ratio of above-mentioned downlink throughput capacity value and total throughput value is more than default Second Threshold D_R_ Threshold, if being more than, it is determined that need to adjust descending EDCA parameter value；If being not more than, it is determined that need not adjust descending EDCA parameter value.Wherein, Second Threshold is more than 0.5, and during implementing, Second Threshold can be set according to actual conditions Put, for example, settable Second Threshold is 0.8.It should be noted that first threshold and Second Threshold can be set as the case may be It is identical or different.

Alternatively, the specific implementation that AP judges whether to need to adjust descending EDCA parameter value in step 201 can be with For：AP judges whether the ratio of above-mentioned downlink throughput capacity value and uplink throughput value is more than the second threshold value, if, it is determined that need Adjust up EDCA parameter value；If not, it is determined that up EDCA parameter value need not be adjusted.Wherein, the second threshold value is more than 1, during implementing, the second threshold value can be configured according to actual conditions, for example, settable second threshold value is 4.

It should be noted that during implementing, can only judge whether to need to adjust up EDCA parameter value, or Only judge whether to need to adjust descending EDCA parameter value；Also it can sentence while judging whether to need to adjust up EDCA parameter value Whether disconnected to need to adjust descending EDCA parameter value, the scheme of the embodiment of the present invention is limited not to this.

Specifically, AP can determine the terminal in active state in the following manner：

AP estimates message according to what the message number of each subcycle in the terminal last cycle of association determined current period Number；When it is determined that the message total number of the terminal current period is more than message number is estimated, it is in active to determine the terminal The terminal of state；Or, when it is determined that the uplink message total number of the terminal current period is more than default three threshold value, it is determined that The terminal is the terminal in active state；Or, it is determined that the downlink message total number of the terminal current period is more than default Four threshold values when, determine the terminal be the terminal in active state.

Wherein, current period is estimated message number and can determined according to below equation：

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor terminal last week The message number of i-th of subcycle of phase, N is the number for the subcycle that a cycle is included.During implementing, N's Value is generally 10.Wherein, the message number of a subcycle is the uplink message number and downlink message number of the subcycle Sum.

During implementing, the 3rd threshold value and the 4th threshold value can be configured according to actual conditions, for example, settable 3rd threshold value is 100, and the 4th threshold value is 200.

It should be noted that according to the message number of each subcycle in terminal last cycle in scheme of the embodiment of the present invention Determining the purpose for estimating message number of current period is, the message total number to current period is estimated.If current week The message total number of phase reality is more than the message number of estimating of current period, represents that terminal is currently frequently being reported with AP Text interaction.

In order to more accurately estimate the message number of current period, it is determined that when estimating message number of current period, The weighted value set for the message number of each subcycle in last cycle increases with the increase of the sequence number of subcycle, wherein, The sequence number of the subcycle in last cycle is bigger, represents the subcycle in time closer to current period.That is, being last The message number of subcycle in multiple subcycles in cycle close to current period sets larger weighted value, is the last cycle The message number of the subcycle away from current period sets less weighted value in multiple subcycles.For example, being the last cycle The weighted value that the message number of 3rd subcycle is set is 2/10, is that the message number of the 6th subcycle in last cycle is set Weighted value be 5/10, wherein, the 6th sub- cycle phase in last cycle is for the 3rd subcycle in time closer to current Cycle.

Alternatively, identical weighted value m/N can be set for the message number of each subcycle in last cycle.For example, current Cycle estimates message number and can also determined according to below equation：

Wherein, m is the positive integer more than 1 and less than N, it is preferable that m value is 2.

The message total number of terminal current period is the message number sum of each subcycle in the terminal current period. The uplink message total number of terminal current period is the uplink message number sum of each subcycle in the terminal current period. The downlink message total number of terminal current period is the downlink message number sum of each subcycle in the terminal current period.

Wherein, multiple terminals can be associated under an AP, for a terminal, if the terminal has interacting for message with AP, Then may be just in transmission services data, therefore, by counting the up of a period of time interior terminal transmission between the terminal and AP Message number and the downlink message number received, it may be determined that whether the terminal is in active state.If in the terminal of AP associations There are multiple terminals to be in active state, represent that current network is in the busy stage, there may be multiple terminals while competing same Channel resource, occurs the possibility of competition collision than larger.Therefore, according to the number of the terminal in active state in current period Amount adjustment EDCA parameter value, may be such that the setting of EDCA parameter value is optimized.

In step 202, AP adjusts up EDCA parameter value according to the quantity of the terminal in active state in current period, Specifically include：

AP is by the Arbitration Inter Frame Space in up EDCA parameter value（Arbitration Inter-frame Space, AIFS）It is set toBy the minimum competition window in up EDCA parameter value（Content Window Minimum, CWmin）It is set toAnd by the maximum contention window in up EDCA parameter value（Content Window maximum, CWmax）It is set toWithBetween random number；Wherein, n For the quantity of the terminal in active state in current period, a, b and e are the positive integer more than 1, and c and d are positive integer.

Specifically, a value be generally 2 or 3, b span be generally 2~10, d span be generally 1~ N/2, e span are generally 2~5.Preferably, the value that the value that the value that a value is 2, b is 2, c is 1, d is 2, E value is 2.

In step 102, AP adjusts descending EDCA parameter value according to the quantity of the terminal in active state in current period, Specifically include：

AIFS in descending EDCA parameter value is set to by APBy in descending EDCA parameter value CWmin is set toAnd be set to the CWmax in descending EDCA parameter valueWithBetween random number.Wherein, a~e value is identical with step 101.

Wherein,It is the operator that rounds up,It is downward rounding operation symbol.

It should be noted that EDCA parameter value includes AIFS, CWmin, CWmax and transmission opportunity（TXOP, Transmission Opportunity）Four parameters.Wherein tri- parameters of AIFS, CWmin and CWmax are for competitive resource , TXOP is to compete the maximum length once sent to after resource.Need to meet between AIFS, CWmin and CWmax：AIFS< CWmin<CWmax.It is by the purposes being configured in the manner described above of AIFS, CWmin and CWmax in EDCA parameter value, when The quantity of the terminal in active state is bigger in the preceding cycle, represents that the competition to resource is fiercer, then needs according to current period The quantity of the interior terminal in active state reduces rapidly EDCA parameter value.

Up EDCA parameter value after adjustment can be passed through beacon by AP after up EDCA parameter value is adjusted（beacon） Frame detects request（probe request）Frame is notified to terminal.

AP can set the descending EDCA parameter value after adjustment the hardware team to AP after descending EDCA parameter value is adjusted In row.

Embodiment two：

The present embodiment two is a kind of equipment for the adjustment EDCA parameter value for belonging to same inventive concept with embodiment one, therefore The implementation of embodiment two may refer to the implementation of embodiment one, repeats part and repeats no more.

As shown in figure 3, the equipment includes：

Judge module 31, judges whether to need to adjust for the uplink throughput value and downlink throughput capacity value according to current period Whole up EDCA parameter value or descending EDCA parameter value；

Processing module 32, for when the judge module 31 determines to need to adjust up EDCA parameter value, according to current The quantity of the terminal in active state adjusts up EDCA parameter value in cycle；And determine to need in the judge module 31 When adjusting descending EDCA parameter value, descending EDCA parameters are adjusted according to the quantity of the terminal in active state in current period Value.

Alternatively, the judge module 31 specifically for：

Judge whether the ratio of the uplink throughput value and total throughput value is more than default first threshold；If big In, it is determined that need to adjust up EDCA parameter value；If being not more than, it is determined that up EDCA parameter value need not be adjusted；And Judge whether the ratio of the downlink throughput capacity value and total throughput value is more than default Second Threshold；If being more than, it is determined that Need to adjust descending EDCA parameter value；If being not more than, it is determined that descending EDCA parameter value need not be adjusted；Wherein, it is described total Throughput value is the uplink throughput value and the downlink throughput capacity value sum；Wherein, total throughput value is described Uplink throughput value and the downlink throughput capacity value sum.

Alternatively, the processing module 32 is additionally operable to：

Message is estimated according to what the message number of each subcycle in the terminal of association last cycle determined current period Number；When it is determined that the message total number of the terminal current period estimates message number more than described in, it is place to determine the terminal In the terminal of active state；Or, it is determined that the uplink message total number of the terminal current period is more than default 3rd threshold During value, it is the terminal in active state to determine the terminal；Or, it is determined that the downlink message of the terminal current period is total When number is more than default four threshold value, it is the terminal in active state to determine the terminal.

Alternatively, the processing module 32 according to below equation determination specifically for estimating message number：

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor institute The message number of i-th of subcycle in terminal last cycle is stated, N is the number for the subcycle that a cycle is included.

Alternatively, the processing module 32 specifically for：

When the judge module 31 determines to need to adjust up EDCA parameter value, by the up EDCA parameter value Arbitration Inter Frame Space AIFS is set toBy the minimum competition window in the up EDCA parameter value CWmin is set toAnd be set to the maximum contention window CWmax in the up EDCA parameter valueWithBetween random number；Wherein, n is to be in enliven shape in the current period The quantity of the terminal of state, a, b and e are the positive integer more than 1, and c and d are positive integer；And

When the judge module 31 determines to need to adjust descending EDCA parameter value, by the descending EDCA parameter value AIFS is set toCWmin in the descending EDCA parameter value is set toAnd by institute The CWmax stated in descending EDCA parameter value is set toWithBetween random number.

Alternatively, the processing module 32 is additionally operable to：

After up EDCA parameter value is adjusted, the up EDCA parameter value after adjustment is passed through into beacon beacon frames or spy Make a thorough investigation of and ask probe request frames to notify to terminal.

Wherein, the equipment of the adjustment EDCA parameter value in the embodiment of the present invention two can be the AP in embodiment one.

It should be noted that in the embodiment of the present invention two to adjust EDCA parameter value equipment each part description It is that each part also possesses and realizes institute in embodiment one in the description to each part major function, the embodiment of the present invention two The function of the method and step of description, meanwhile, the equipment of the adjustment EDCA parameter value in the embodiment of the present invention two, which also has, performs reality Apply the logic module of each step of example one.

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the present invention can be used in one or more computers for wherein including computer usable program code Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program production of upper implementation The form of product.

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (10)

1. a kind of adjust the method that enhanced distributed channel accesses EDCA parameter value, it is characterised in that methods described includes：

Access point AP judges whether to need to adjust up EDCA according to the uplink throughput value and downlink throughput capacity value of current period Parameter value or descending EDCA parameter value；

The AP is when it is determined that need to adjust up EDCA parameter value, according to the number of the terminal in active state in current period The up EDCA parameter value of amount adjustment；And

The AP is when it is determined that need to adjust descending EDCA parameter value, according to the number of the terminal in active state in current period The descending EDCA parameter value of amount adjustment；

Wherein, the AP adjusts up EDCA parameter value according to the quantity of the terminal in active state in current period, specifically Including：

Arbitration Inter Frame Space AIFS in the up EDCA parameter value is set to by the APWill be described Minimum competition window CWmin in up EDCA parameter value is set toAnd by the up EDCA parameter value Maximum contention window CWmax is set toWithBetween random number；Wherein, n is institute The quantity of the terminal in active state in current period is stated, a, b and e are the positive integer more than 1, and c and d are positive integer；

The AP adjusts descending EDCA parameter value according to the quantity of the terminal in active state in current period, specifically includes：

AIFS in the descending EDCA parameter value is set to by the APBy the descending EDCA parameter value In CWmin be set toAnd be set to the CWmax in the descending EDCA parameter valueWithBetween random number.

2. the method as described in claim 1, it is characterised in that the AP judges whether to need to adjust up EDCA parameter value, Specifically include：

The AP judges whether the ratio of the uplink throughput value and total throughput value is more than default first threshold；If big In, it is determined that need to adjust up EDCA parameter value；If being not more than, it is determined that up EDCA parameter value need not be adjusted；

The AP judges whether to need to adjust descending EDCA parameter value, specifically includes：

The AP judges whether the ratio of the downlink throughput capacity value and total throughput value is more than default Second Threshold；If big In, it is determined that need to adjust descending EDCA parameter value；If being not more than, it is determined that descending EDCA parameter value need not be adjusted；

Wherein, total throughput value is the uplink throughput value and the downlink throughput capacity value sum.

3. the method as described in claim 1, it is characterised in that the AP determines the end in active state in the following manner End：

The AP estimates message according to what the message number of each subcycle in the terminal last cycle of association determined current period Number；

The AP determines the end when it is determined that the message total number of the terminal current period estimates message number more than described in Hold as the terminal in active state；Or, the AP is it is determined that the uplink message total number of the terminal current period is more than During default three threshold value, it is the terminal in active state to determine the terminal；Or, the AP is it is determined that the terminal is worked as When the downlink message total number in preceding cycle is more than default four threshold value, it is the terminal in active state to determine the terminal.

4. method as claimed in claim 3, it is characterised in that the AP estimates message according to being determined below equation Number：

$pkt\_queue\_next=\frac{U\_Threhold+D\_Threhold}{2}+\underset{i=1}{\overset{N}{\&Sigma;}}\frac{i-1}{N}pkt\_{\mathrm{queue}}_i;$

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor the end The message number of i-th of subcycle in last cycle is held, N is the number for the subcycle that a cycle is included.

5. the method as described in Claims 1 to 4 is any, it is characterised in that the AP after up EDCA parameter value is adjusted, Also include：

The AP by the up EDCA parameter value after adjustment by beacon beacon frames or detect request probe request frames lead to Know to terminal.

6. a kind of adjust the equipment that enhanced distributed channel accesses EDCA parameter value, it is characterised in that the equipment includes：

Judge module, judges whether to need adjustment up for the uplink throughput value and downlink throughput capacity value according to current period EDCA parameter value or descending EDCA parameter value；

Processing module, for when the judge module determines to need to adjust up EDCA parameter value, locating according in current period Up EDCA parameter value is adjusted in the quantity of the terminal of active state；And determine to need adjustment descending in the judge module During EDCA parameter value, descending EDCA parameter value is adjusted according to the quantity of the terminal in active state in current period；

Wherein, the processing module is specifically for when the judge module determines to need to adjust up EDCA parameter value, by institute The Arbitration Inter Frame Space AIFS stated in up EDCA parameter value is set toBy the up EDCA parameter value In minimum competition window CWmin be set toAnd by the maximum contention window in the up EDCA parameter value CWmax is set toWithBetween random number；Wherein, n is in the current period The quantity of terminal in active state, a, b and e are the positive integer more than 1, and c and d are positive integer；And

When the judge module determines to need to adjust descending EDCA parameter value, the AIFS in the descending EDCA parameter value is set It is set toCWmin in the descending EDCA parameter value is set toAnd will be described descending CWmax in EDCA parameter value is set toWithBetween random number.

7. equipment as claimed in claim 6, it is characterised in that the judge module specifically for：

Judge whether the ratio of the uplink throughput value and total throughput value is more than default first threshold；If being more than, It is determined that needing to adjust up EDCA parameter value；If being not more than, it is determined that up EDCA parameter value need not be adjusted；And

Judge whether the ratio of the downlink throughput capacity value and total throughput value is more than default Second Threshold；If being more than, It is determined that needing to adjust descending EDCA parameter value；If being not more than, it is determined that descending EDCA parameter value need not be adjusted；

Wherein, total throughput value is the uplink throughput value and the downlink throughput capacity value sum.

8. equipment as claimed in claim 6, it is characterised in that the processing module is additionally operable to：

Message number is estimated according to what the message number of each subcycle in the terminal of association last cycle determined current period； When determining that the message total number of the terminal current period estimates message number more than described in, it is in active to determine the terminal The terminal of state；Or, when it is determined that the uplink message total number of the terminal current period is more than default three threshold value, really The fixed terminal is the terminal in active state；Or, it is determined that the downlink message total number of the terminal current period is big When default four threshold value, it is the terminal in active state to determine the terminal.

9. equipment as claimed in claim 8, it is characterised in that the processing module according to below equation specifically for determining institute State and estimate message number：

$pkt\_queue\_next=\frac{U\_Threhold+D\_Threhold}{2}+\underset{i=1}{\overset{N}{\&Sigma;}}\frac{i-1}{N}pkt\_{\mathrm{queue}}_i;$

Wherein, U_Threhold is the 3rd threshold value, and D_Threhold is the 4th threshold value, pkt_queue_iFor the end The message number of i-th of subcycle in last cycle is held, N is the number for the subcycle that a cycle is included.

10. the equipment as described in claim 6~9 is any, it is characterised in that the processing module is additionally operable to：

After up EDCA parameter value is adjusted, by the up EDCA parameter value after adjustment is by beacon beacon frames or detect please Probe request frames are asked to notify to terminal.